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DS1302S The Dallas Semiconductor DS1302S is a real-time clock/calendar chip with 31 bytes of battery-backed RAM. It features a simple 3-wire serial interface and operates on low power.
Mfr Part #:

DS1302S

Available from 2 distributors
Mfr Name: Dallas Semiconductor
Dallas Semiconductor
The Dallas Semiconductor DS1302S is a real-time clock/calendar chip with 31 bytes of battery-backed RAM. It features a simple 3-wire serial interface and operates on low power.
✓ Total Stock: 257 pcs
$ Price Range: $0.30

DS1302S Available from 2 distributors

✓ Authorised
✓ Non-Authorised
Distributor Stock Pricing MOQ PKG Lead Time Date Code On Order Quantity On Order Delivery
Smaxon Electronics ✓
Non-Authorised Inventory information
223 pcs
On Request
223 pcs On Request 1 On Request On Request 04+ On Request On Request
Partservice ✓
Non-Authorised Inventory information
34 pcs
On Request
34 pcs On Request 1 On Request On Request On Request On Request On Request
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DS1302S Specifications Quick View

Most important parameters for selection – full specs in datasheet.
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DS1302S Description

Short technical summary and product information.

The DS1302S from Dallas Semiconductor is a trickle-charge timekeeping chip that manages all timekeeping functions, including seconds, minutes, hours, date, month, day of the week, and year with leap-year compensation valid up to 2100. It also includes 31 bytes of battery-backed general-purpose RAM.

 

This IC interfaces with microcontrollers via a simple 3-wire serial port (CE, I/O, SCLK) and supports TTL-compatible logic levels at 5V. Data transfer can be done in single-byte or multiple-byte (burst) modes for reading or writing clock and RAM data. The device is designed for low power consumption, using less than 300nA at 2.0V, which extends battery backup run time.

 

The DS1302S is available in an 8-pin DIP package and an 8-pin SO package, minimizing the space required on a PCB. An optional industrial temperature range of -40°C to +85°C is supported for operation in a wide range of applications. The device is UL recognized.

 

This component is suitable for applications requiring accurate timekeeping and data storage, such as embedded systems, data loggers, and portable devices where power efficiency is critical.

DS1302S Quick Information

Product Type: Real-Time Clock (RTC) IC
Canonical Name: DS1302S Real-Time Clock/Calendar Chip
Subcategory: Timekeeping Chip

DS1302S Compliance

RoHS Status: RoHS Compliant
Moisture Sensitivity Level (MSL): 1 Unlimited
REACH Status: REACH Unaffected

DS1302S Estimated Pricing

Qty Low High
1+ $0.30 $0.30

Estimated market price range - modelled values for guidance only, not live distributor offers.

DS1302S Features

  • Manages all timekeeping functions accurately.
  • Includes 31 bytes of battery-backed RAM.
  • Simple 3-wire serial interface.
  • Low power operation extends battery life.
  • Available in DIP and SO packages.

DS1302S Applications

  • Embedded systems timekeeping.
  • Data logging applications.
  • Portable electronic devices.
  • Real-time calendar functions.
  • Low-power battery-backed systems.

DS1302S FAQs

7 frequently asked questions generated from this part’s specifications.
What timekeeping functions does the DS1302S manage?

The DS1302S manages seconds, minutes, hours, date of the month, month, day of the week, and year, including leap-year compensation valid up to 2100.

How much battery-backed RAM is available on the DS1302S?

The DS1302S provides 31 x 8 bytes of battery-backed general-purpose RAM.

What type of interface does the DS1302S use?

The DS1302S uses a simple 3-wire serial interface.

What is the operating voltage range for the DS1302S?

The DS1302S operates from 2.0V to 5.5V.

What is the typical current consumption of the DS1302S?

The DS1302S uses less than 300nA at 2.0V.

What are the available package types for the DS1302S?

The DS1302S is available in 8-pin DIP and 8-pin SO packages.

What is the operating temperature range for the DS1302S?

The DS1302S supports an optional industrial temperature range of -40°C to +85°C, and a standard range of 0°C to +70°C.

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